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A A SEA GOING VESSEL. No. 267,051. Patented Nov. 7, 1882..

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SEA GOING VESSEL.

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SEA @,QING VESSEL.

Patented Nov. '7, 1882.

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UNITED STATES PATENT OFFICE.

DANIEL AMMEN, OF BELTSVILLE, MARYLAND.

SEA-GOING VESSEL.

SPECIFICATION forming part of Letters Patent No. 267,051, dated November *7, 1882. i Application led March 10, 1882. (No model.)

To all whom it may concern Be it known that LDANL. AMMEN, of Belts,

ville, Prince Georges county, and State of Maryland, have invented a new and useful Improvementin Sea-Going Vessels, which improvement is fully set forth in the `following specification and accompanying drawings, in which- Figure 1 is atransverse section of theiniddle body of the vessel. Fig. 2 is a longitudinal projection of the fore body. Fig. 3 is a longitudinal projection of the after body.

The object of the invention is to produce a vessel of extraordinary strength of construction, of great handiness in movement, and capable of being kept aiioat and even temporarily repaired at sea should a hole of very considerable size be made in the bottom by whatever cause.

Fig. 1 represents the transverse section of the vessel, and is formed on two semi-conj ugates of elli pses, the curves of which are prolonged to meet at A and A in the plane common to both elipses. The spaces between the true ellpses and the prolongations of the curves before mentioned may be filled with sponsoning, as shown in the drawings, should the purpose of the construction be favored b v a sponsoning. It also shows longitudinal bulkheads Al AIl and B B". Fig. 2 exhibits the principles of the model longitudinally in the coming together of the girders upon which the vessel is built following the curves of a parabola, and showing the line ot' keel G D', following the curve of aparabola for any desired proportionate length of the keel, and terminating in the plane of the greatest beam. The point toward which these parabolic curves are projected may be at some distance beyond the terminals or bow and'stern of the vessel, and the bow and stern fashioned and fastened as desired. Fig. 3 shows the same principle for the construe tion of the after body as exhibited by Fig. 2 in the construction ot' the fore body-namely, the coming together of the girders on parabolic curves, grillage, truss-work, or a curved arm, G, as shown in the drawings, to support the rudder-post, may be employed in the construction, the object of which is to secure the eral pressure against the action of the rudder when employed in turning the vessel as rapidly as possible,

Throughout the vessel transverse bulk-.heads are placed where practicable, at distances apart equal to the half-.sum of the transverse and vertical diameters of the interior shell of the vessel. For the prevention ot' sinking, should a considerable hole be knocked in the bottom, it is necessary to have closed allot' the apertures through the deck, except the smokestack and parts over the lire-room, by means of air-tight scuttles or hatches, and to bulkrudder, and at the same time to avoid the lat- 5o head off the tire-room and any portion of the engine-room desired from the other portions of the interior ot' the vessel, bracing the bulkheads sufficiently to resist the pressure caused by operating a steam air-pump having the necessary pipes attached, through which the various compartments other than the fire-room or part bulk-headed off shall be filled with compressed air and held under pressure slightly in excess of that of 'a column of waterhaving the height of the draft of the vessel.

The vessel, as represented in the drawings, has a center transverse section formed on halt'- ellipses having a common diameter, but different semiconjugates. The employment of tangents which meet on the plane common to the two half-ellipses forms a spon'soning, inaterially increasing the beam, which is terminated in an edge. The longitudinal section, as represented in the drawings, is composed ot' a straight body in the center ot' any desired length, from whence'toward each extremity the girders converge, following the arcs of screw-bolts to ianges cast on a steel head. On the stern the' girders converge in a manner somewhat different, and are secured without the intervention of a casting.

5 Girders and bracket-frames have been employed for some time, and l make no claim for their use.

Vhat I claim as original isl. A vessel constructed on a double system 1o of arches and on tangents to the same for the cross-section, substantially as described.

l 2. A vessel whose longitudinal sections t'ollow the arcs of a parabola to a common point in the bowin the planeof the two half-ellipses,

15 substantially as described. Y'

3. A vessel the lower section of the after Witnesses:

EDMOND BRODHAG, J. W. HAMILTON JOHNSON. 

